1 files changed, 49 insertions, 0 deletions
diff --git a/arch/sparc64/lib/delay.c b/arch/sparc64/lib/delay.c
new file mode 100644
index 000000000000..f6b4c784d53e
--- /dev/null
+++ b/arch/sparc64/lib/delay.c
@@ -0,0 +1,49 @@
+/* delay.c: Delay loops for sparc64
+ *
+ * Copyright (C) 2004 David S. Miller <davem@redhat.com>
+ *
+ * Based heavily upon x86 variant which is:
+ *	Copyright (C) 1993 Linus Torvalds
+ *	Copyright (C) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
+ */
+
+#include <linux/delay.h>
+
+void __delay(unsigned long loops)
+{
+	__asm__ __volatile__(
+"	b,pt	%%xcc, 1f\n"
+"	 cmp	%0, 0\n"
+"	.align	32\n"
+"1:\n"
+"	bne,pt	%%xcc, 1b\n"
+"	 subcc	%0, 1, %0\n"
+	: "=&r" (loops)
+	: "0" (loops)
+	: "cc");
+}
+
+/* We used to multiply by HZ after shifting down by 32 bits
+ * but that runs into problems for higher values of HZ and
+ * slow cpus.
+ */
+void __const_udelay(unsigned long n)
+{
+	n *= 4;
+
+	n *= (cpu_data(_smp_processor_id()).udelay_val * (HZ/4));
+	n >>= 32;
+
+	__delay(n + 1);
+}
+
+void __udelay(unsigned long n)
+{
+	__const_udelay(n * 0x10c7UL);
+}
+
+
+void __ndelay(unsigned long n)
+{
+	__const_udelay(n * 0x5UL);
+}